论文部分内容阅读
通过溶胶-凝胶法成功制备了纳米TiO_2/硅藻土复合材料,并通过浸渍法进一步制备了聚苯乙烯/TiO_2/硅藻土复合材料。采用扫描电子显微镜、X射线粉末衍射、傅里叶红外光谱和紫外-可见分光光度计等手段对样品进行表征,分析了复合材料的形貌、结构、组成及其光催化降解甲醛的性能。结果表明:硅藻土负载的纳米TiO_2具有良好的光催化性能,聚苯乙烯包覆可以提高纳米TiO_2/硅藻土复合材料的分散性和稳定性,对甲醛的光催化降解能力并无大的影响。其中0.1%聚苯乙烯包覆复合材料的光催化效果最好,在溶液中甲醛降解率可以达到47.08%,在空气中可以达到54.96%。
The nano-TiO 2 / diatomite composite was successfully prepared by sol-gel method and the polystyrene / TiO 2 / diatomite composite was further prepared by impregnation method. The samples were characterized by scanning electron microscopy, X-ray powder diffraction, Fourier transform infrared spectroscopy and ultraviolet-visible spectrophotometer. The morphology, structure, composition and photocatalytic degradation of formaldehyde were analyzed. The results showed that the diatomite-loaded nano-TiO 2 has good photocatalytic activity. The polystyrene coating can improve the dispersion and stability of nano-TiO 2 / diatomite composites. The photocatalytic degradation of formaldehyde is not significant influences. Among them, 0.1% polystyrene coated composite had the best photocatalytic activity, the degradation rate of formaldehyde in solution reached 47.08%, and reached 54.96% in air.